The reality star posted a selfie alongside a mate and captioned it "heat wave".
"She looks like the old Kylie here idk why", quipped one fan in the comments.
Kylie created a beauty empire based on her plump lips.
The 20-year-old - who will celebrate her 21st birthday on 10 August - owned up to having temporary lip fillers in 2015 during an episode of Keeping Up with the Kardashians. "I was going to somebody before, and it was just looking insane".
When she was just 17, Kylie opened up on her decision to have the procedure done after being self-conscious over her thin lips.
And Kylie revealed exactly why the new mum now looks like "the old Kylie". "People flashback to pictures of me when I was 12 and say, "Kylie's so different" but how can i look the same from 12-18?"
Neymar shines as Brazil oust Mexico
But Brazilian keeper Alisson, lifted it over the goal for his first save of the game. In the end, Mexico leaves Russian Federation with consecutive scoreless matches.
"I test out most of my stuff on Jordyn because we live together, So I'm like, 'Jordyn, I need you.' Everyone that comes in my house has red-tinted arms from swatches and shadows", Jenner said.
Joking about her appearance, she added: "And then I had to go back and have it fixed, and it was a insane process".
She later admitted she may have initially gone "too far" when she started the injections.
But Kylie has made a killing off her desired lips and almost ideal face.
"This guy I kissed was like, 'Your lips are really small but you're a really good kisser". I just didn't feel desirable or pretty.